That’s probably a red flag
TBH, I don't see it as a red flag. Well, unless the employee is making notes in a corporate system about you or w/e, that's different.
But if you buy stuff, and employee recognizes you with their human brain and human eyeballs, I don't have a problem with that. It's the data aggregation which is harmful IMO. The automated systems extracting all possible info. The personal dossiers. The population scale. The inferences made about everyone, and selling to other co's to predict and manipulate all our behavior.
I walk into local sandwich shop, Joe behind the counter greets me by name b/c I'm in every week? I'm cool with that.